Why do we need vfs.root.mountfrom for zfs

[Aldis Berjoza]

18.11.2012, 21:19, "Andriy Gapon" <avg at FreeBSD.org>:
> on 18/11/2012 16:03 Aldis Berjoza said the following:
>
>>  I was wondering why oh, why do we need to set
>>  vfs.root.mountfrom in /boot/loader.conf in order to boot from zfs.
>
> Who is 'we'?  And why do you think 'we' have to do that? :-)
>
>>  zpools have bootfs option.
>>
>>  This info is redundant.
>>  I think one of two could be totally avoided at least in case when we boot form gptzfsboot.
>>
>>  What I'm missing?
>
> You don't miss anything.  The defaults work fine.  You don't have to set
> vfs.root.mountfrom unless you want it to point to some non-default fs.
>
> More details:
> http://ru.kyivbsd.org.ua/arhiv/2012/kyivbsd12-gapon-zfs.pdf?attredirects=0&d=1
> Page 17 and one.
>
> --
> Andriy Gapon

Thank you, thank you so very much.
I never knew vfs.root.mountfrom was optional. All the turorials I've been reading said to set it.

-- 
Aldis Berjoza
FreeBSD addict